Speciation

I love that you were able to cover multiple terms within one video. Most definitions I need for my exam are here!!!! THANK YOU

idk about the hamburger and vegan example not happening. As tension rises between vegans and meat eaters, behavioral isolation could result in vegans and meat eaters no longer interbreeding since they have different values and live differently. Eating is a big portion of the day and socializing.

What mr Andersson doesn´t tell you in this video is what happens after 20 - 50 generations with fruitflies...

Awww. He said, "Okur" like Cardy B lol

Could you flip the snail over and oposite side.
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Who's Here In 2021?

The video is very engaging and understandable especially with accurate examples...Thanks!!!😊

Scrophularia lowei:
"The Macaronesian Scrophularia lowei is hypothesized to have arisen from the widespread S. arguta on the basis of several phylogenetic studies of the genus, but sampling has been limited. Although these two annual species are morphologically distinct, the origin of S. lowei is unclear because genetic studies focused on this Macaronesian species are lacking."

This is not an example of speciation.

Cichlid fish:
"More than 500 species of often brightly colored cichlid fish have evolved there in just a few hundred thousand years !"

Since this took place over a few hundred thousand years nobody saw this happen and the hypothetical speciation events are just someone's imagination. No examples of speciation here.

Kaibab and Albert's squirrels:
"Originally only one squirrel species inhabited the Ponderosa pine forrest around the rim of the Grand Canyon , the Albert’s squirrels. About 10,000 years ago when the last ice age ended, physical formations in the canyon changed in a way that blocked the squirrels access to the Colorado River, much less cross it. The canyon became a geographic barrier separating the forests and squirrels on each rim. One population of squirrels had become two separate populations that could no longer interbreed, the kaibab squirrels.Abert’s squirrels (Sciurus aberti) are a North American species, found across a range of locations. Kaibab squirrels (Sciurus aberti kaibabensis) are a subspecies of Abert’s squirrels, found only in one area in the United States."

This was 10,000 years ago. The speciation event is just someone's imagination. This is not an example of speciation.

Tennessee cave salamanders:
"The researchers sequenced DNA samples from 109 cave and spring salamanders from 43 locations throughout Tennessee. They then plugged the data into a sophisticated computer model that compared possible evolutionary histories for the salamanders and calculated which scenario provided the most likely explanation for the genetic patterns observed. The results suggested that the cave salamanders could not have evolved in isolation from the surface species. In fact, the most likely history was one in which spring salamanders regularly interbred with cave salamanders even as the two species were diverging about 2 million years ago ."

Wait! That was 2 million years ago! This is just someone's imagination and is not an example of speciation.

Greenish warbler birds, Ensatina salamanders, Larus Gulls:
Ring species: Animals A, B, C, and D were created such that...
A can breed with B.
B can breed with C.
C can breed with D.
A can't breed with D.

Drosophila flies:
"This experiment took two pre-existing strains of fruit flies from within the same species — Drosophila melanogaster — and sought to determine whether changes in mating preferences could be induced. This included artificially killing hybrids between the strains (a process that does not necessarily mimic nature). Incomplete reproductive isolation was established. One paper cited by the FAQ (Knight et al. 1956) called only “partial sexual isolation,” another paper in the FAQ (Halliburton and Gall, 1981) lists this study among various studies where “none has succeeded in establishing complete sexual isolation.”

No speciation here.

Galapagos finches:
"An example of speciation is the Galápagos finch. Different species of these birds live on different islands in the Galápagos archipelago, located in the Pacific Ocean off South America. The finches are isolated from one another by the ocean. Over millions of years , each species of finch developed a unique beak that is especially adapted to the kinds of food it eats."

Over millions of years? Just more imagination.

It is claimed that speciation is observed. That doesn't appear to be the case at all.

Each example of Observed Speciation Mr Andersen notes here is bogus.
Polyploidy is often cited by neo-Darwinists as speciation. It is nothing of the kind.
Polyploidy is a freak doubling of DNA - sometimes all of it - usually in plants.
The offspring may not breed with their progenitors to produce fertile offspring. Yes.
But a freak doubling of DNA is not the g-r-a-d-u-a-l change of sympatry or allopatry. Nor may the plant and animal kingdoms be attributed to just polyploidy.
Temporal... Mechanical... Behavioural... Speciation events

Really?
The two types of toad which breed at different seasons are, again, not reproductively isolated. When they DO mate, he concedes, you get fertile offspring.
Show the snails have diverged to be mechanically incapable of mating to produce fertile offspring and you have a case for speciation.
That case he cannot make.
His meadowlarks are "not interbreeding" because they CHOOSE not to. Not because they cannot.
The plants segregated by the wall simply cannot reach the other grasses. That´s geographical isolation and not inability to breed. Mr Andersen claims, "Eventually you can create brand new species through that". That´s speculation. Nothing more.
Each example of Observed Speciation at Boxhorn´s page at www.talkorigins may be similarly dismissed.
Speciation has never yet been observed.
btw, there have been SIXTY recorded instances where a mule DID give birth.

Please don’t delete this video!
It is really useful

your way of explaining makes me love bio even more thank you! and your videos are always helpful

i wish you were my professor

We're paying our professor 20k and he just sent us to you lol

Just put the speed on 1.25 and hope your bio teacher has reasonable expectations.

Watch at 2x

I enjoy your work! keep it up!

who is watching this for Living Environment

Who is watching this for the Corona Virus

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sir you are saving all these ap bio kids thank you

Very nice, 😜

Excellent video!
Thank you so much ❤

Is there any amount of speciation over any amount of time that has been scientifically proven to cause one type of animal to transform into a completely different type of animal (i.e. fish to lizzard, etc.)? Or does speciation have bounds / limits? Please explain. Thanks for sharing.

I love how he says "Hope that's helpful" when it ALWAYS is, thank you!!

So how can evolution be proven to be true if yes, the animal can create new species within generations but it still stays the same “original type”, example the elephants will always be elephants and can or cannot breed with eachother? Doesn’t that disprove the theory in general?

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2018 vegans will be triggered with the hamburger example hahaha

yeah this haters can't stand it I'm the last man standing hit the chug jug hit the chug jug hit hit the chug jug hit the chug jug storms almost finished

U r too good.....better than some teachers of India.. Only some not all..u r osum

Is diabetes real

We are told over and over and over that a new species shows evolution. Nope. Speciation does not support evolution as it is an example of stasis and stasis is the exact opposite of evolution. For ex. over 200,000 species of beetles are all still beetles. There are thousands upon thousands of species of birds, bees, lizards, trees, bacteria, trees, yeast, flowers, whatever. If a new species develops within any groups at all, you can bet your bottom science dollar that it will still be just a beetle, bee, bacteria, tree, fish, or whatever.
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We are supposed to fill in the blanks here with...faith...and think, "Well! If a new species develops then things just keep evolving and evolving from there on." But the next step above a species, in the animal or plant kingdom, is a family. (A genus is just a grouping of similar species together). We aren't seeing any new families (much less any new order, class, phylum or kingdom) forming. Anywhere. Ever. According to Darwin's so called Tree of Life and peer reviewed evolutionary literature, new Families have evolved. Over and over and over.
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However, nature operates today as it did in the past. In the real world, with trillions of life forms around us, we never see anything developing above the level of a new species. Those life forms out there have purportedly had eons and eons of ancestors preceding them which should be revealing at least one example of a part this family "transitioning" to be a part that of another family. Again, we see stasis.
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We only see "transitions" to those higher levels in the purely theoretical, unverifiable, ancient past, in the realm of evolutionary literature, and never in any life around us. If there is no evidence for transitions from one family to another - and please provide data if you know of any such evidence in the observable and not theoretical realm - then there is no evidence for evolution. And that's just for starters on how evolutionism defies real science.
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Kindly don't say some fossil provides the evidence. It is easy to point to a pile of petrified bones and make up stories about how its invsible and evidence free descendants turned into some other life form. But if you insist, use a fossil. Name it. Then tell how you know it even had a descendant, much less one signficantly different from it, much less one that crossed the family barrier. Name the family it is transitioning out of and the one it is transtioning into.
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You are not a goo through the zoo update. You have a Heavenly Father Who made you in HIS image and likeness. He loves you and wants you to know Him, and to love Him, too. If you are an atheist and evolution believer, if you are anyone at all, He wants you to be His child. Forever. I know I found that out myself when I was an athesist and evoltuion believer who had never looked outside the box.

I would not pass bio if it wasn't for you

The long term effects of reproductive isolation are a smaller penis, and more stylish decor.

LOL just because bees ate different foods then didn't want to breed does NOT mean we now have 2 separate species. Paul Anderson please tell me you are NOT a biology teacher. And to say that the same species can over billions or millions of years make another species is NOT any SCIENCE no 1 has ever seen. Please look up the definition of science then also the definition of species. Any scientist that states as a fact that any cow can change into any whale has not known the word SCIENCE. Or any other animal over time changing into another animal is by definition is NOT but is in fact PSEUDO science. It cant and has never been observed, can not be testable, and can not be falsifiable. So its has NOTHING to do with any REAL science on our planet.

NS201 anybody?

Me making an educated guess about mechanical isolation before he talks about it: "Is that where their dicks won't fit in??"

I was pretty much right

I really wish we could meet i have watched your videos all the way through highschool and now in college too !!! your my fav teacher

Nice!!

Miss Sheepy-Chan <3 Ap Bio

your videos are great THANK u so much

Brain Laterality is the evolutionary innovation from one single brain to two hemispheres with limited inter-hemispheric connectivity. One in dominance to compete within specie life, 90%. The other to achieve isolative speciation 10%. Left-handedness is higher in males and in general Left-handed males are not as physically strong as the right handed males. All species, especially those species from mammals onward's produce runts. It would be an advantage to evolution to evolve a male who would not be physically able to fight for control of as many females as a dominant right handed male.
Evolution has changed over millions of years from the physical to brain power in finding new life survival strategies. We are a product of the mind, not physical competition.

Can anyone please help me! I got exam! Can any one explain what is the difference between reproductive isolation in both sympatric and allopatric isolation?

I literally learn AP Bio in a day! My teacher has never been in class and she's not going to be present in our test, but you, you are awesome even if you don't know me lol

What an absolute hero